﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp1
{
    class Yuan
    {
        private double r;
        private int c;
        private int k;
        public double R
        {
            get { return this.r; }
            set { this.r = value; }
        }
        public int C
        {
            get { return this.c; }
            set { this.c = value; }
        }
        public int K
        {
            get { return this.k; }
            set { this.k = value; }
        }


        public double aaa(double r)
        {
            return 3.14 * this.r * this.r;
        }


        public int a1(int c,int k) 
        {
            return this.c * this.k;
        }
    }
}